We have a client query regarding UWP as outlined below: Utilize the UWP API to expose Geolocation functions for use within Java through JNI. Prepare a resulting DLL and a JNI wrapper to be used in a Java application. Our team encountered a set of restrictions and limitations while trying to expose the Geolocator from the Windows.Devices.Geolocation API to the JNI layer. Some of the challenges are as follows: Requesting geolocation permissions seems to be possible only from the UI thread of a UWP application. Interoperability constraints between managed and unmanaged C++ code. Packaging a standalone DLL to be loaded via JNI. The main goal is to receive geolocation updates from the Geolocator in a Java application. JNI appears to be the most viable option in our opinion, but we welcome alternative approaches (e.g., a WinRT component communicating with the Java app, a UWP console app launched from Java to receive updates, or any other valid solution). Thank you.

We have a query regarding UWP as outlined

Jay 80

We have a client query regarding UWP as outlined below:

Utilize the UWP API to expose Geolocation functions for use within Java through JNI. Prepare a resulting DLL and a JNI wrapper to be used in a Java application.

Our team encountered a set of restrictions and limitations while trying to expose the Geolocator from the Windows.Devices.Geolocation API to the JNI layer. Some of the challenges are as follows:

Requesting geolocation permissions seems to be possible only from the UI thread of a UWP application.
Interoperability constraints between managed and unmanaged C++ code.
Packaging a standalone DLL to be loaded via JNI.

The main goal is to receive geolocation updates from the Geolocator in a Java application. JNI appears to be the most viable option in our opinion, but we welcome alternative approaches (e.g., a WinRT component communicating with the Java app, a UWP console app launched from Java to receive updates, or any other valid solution).

Thank you.

Roy Li - MSFT 33,091 Reputation points Microsoft Vendor

2024-09-23T06:49:03.4366667+00:00

First of all, the UWP tag on Microsoft Q&A only handles questions about UWP development within UWP project. I have to say that your question about using UWP API in Java application is out of scope of our support. I can't offer more help about your questions that related to Java application.

Requesting geolocation permissions seems to be possible only from the UI thread of a UWP application.

Yes, this is the limitation for the UWP Geolocation API. When you are trying to use the Geolocation API in UWP, it must be called in a UI thread.
Jay 80 Reputation points

2024-09-23T07:07:41.67+00:00

Thank you for the clarification. @Roy Li - MSFT

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We have a query regarding UWP as outlined

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